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Deterioration determining device for battery

a technology of deterioration state and battery, which is applied in the direction of fluid pressure measurement, liquid/fluent solid measurement, machine/engine, etc., can solve the problems of deterioration and accumulation of fatigue in these components, and achieve the effect of high degree of accuracy

Active Publication Date: 2015-09-24
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a device that accurately determines the deterioration state of a battery by taking into account fluctuations in its internal pressure. This results in a high degree of accuracy when determining the battery's state of health. The device also specifies which region of the battery can still be used effectively, allowing for effective re-use of the battery.

Problems solved by technology

Due to fluctuations in internal pressure of the battery depending on age deterioration, usage conditions and the like, fatigue may be accumulated and deterioration may progress in these components.

Method used

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  • Deterioration determining device for battery
  • Deterioration determining device for battery
  • Deterioration determining device for battery

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Embodiment Construction

[0036]Embodiments of the present invention will be described hereinafter with reference to the drawings. In the following description, the same components are indicated by the same reference characters. Their names and functions are also the same. Therefore, detailed description of them will not be repeated.

[0037]As shown in FIG. 1, a deterioration determining device according to the present embodiment is implemented by a personal computer (hereinafter described as “PC”) 100.

[0038]PC 100 is placed in, for example, a battery replacement station for replacing a battery 20 mounted on a vehicle 10 with a replacement battery, a shop (such as a dealer, a used car dealership or a repair shop) that recovers battery 20, a location where recovered battery 20 is stored and managed for reuse or recycling, and other locations.

[0039]PC 100 determines a deterioration state of battery 20 used in vehicle 10. PC 100 may determine the deterioration state of battery 20 mounted on vehicle 10, or may det...

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Abstract

A PC executes a control process including the steps of: calculating an internal pressure increase amount P; calculating an internal pressure fluctuation amount ΔP; calculating a deterioration evaluation value D1; calculating a deterioration evaluation value D2; determining that a battery can be shipped as a secondhand battery when D1+D2 is equal to or smaller than a threshold value A; and determining that the battery cannot be shipped as a secondhand battery when D1+D2 is larger than the threshold value A.

Description

[0001]This nonprovisional application is based on Japanese Patent Application No. 2014-056327 filed on Mar. 19, 2014 with the Japan Patent Office, the entire contents of which are hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a technique of determining a deterioration state of a battery with a high degree of accuracy.[0004]2. Description of the Background Art[0005]A technique of determining whether a battery can be reused or not based on a deterioration state of the battery is known. As the technique of determining the deterioration state of the battery, Japanese Patent Laying-Open No. 2012-127938, for example, discloses a technique of calculating a degree of deterioration of a power storage device with respect to a calendar life or cycle life, based on the number of cycle damages based on a charging current value, a charging time and a representative temperature of the power storage device.[0006]In ...

Claims

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Application Information

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IPC IPC(8): G01R31/36G01L7/00
CPCG01L7/00G01R31/3679H01M10/48H01M10/486Y02T10/7072B60L2240/545B60L2240/547B60L2260/44B60L53/80B60L58/16Y02T10/70Y02E60/10G01R31/392Y02T90/14Y02T90/12
Inventor NAKAYAMA, HIROYUKINAKASHIMA, MAKOTOKOMATSUKI, MASATOKURIMOTO, YASUHIDE
Owner TOYOTA JIDOSHA KK
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